SU198862A1 - DEVICE FOR DRIVE REGULATION - Google Patents

Description

one.

Devices for regulating drives are known. They contain a gear mounted on the output shaft of the machine, differential mechanisms interacting with this wheel, and worm gears connecting one of the links of the differential mechanism with a servomotor. Also known are devices with a resolver and a resolver which are used for remote control of the machine.

The proposed device is characterized in that it is equipped with two lead screws with nuts and guide rails for the nuts. Each screw is connected to one link of the differential mechanism and two limit switches. One switch is mounted on the body of the device and serves to turn off the drive motor, and the other on one of the nuts, interacts with the other nut and serves to turn off one of the servomotors. This device allows to reduce the overloads acting on the drive during the start-up period, it memorizes the speed of rotation of the output shaft when the machine stops during the cycle.

In addition, the device is equipped with an additional limit switch mounted on its housing and used to turn off the second servomotor and the counter of revolutions counter. Last located on the shaft

a gear and serves to turn on both servomotors, with the result that both nuts are retracted to their original position after the end of the cycle.

The drawing shows a schematic diagram of the device for adjusting the drive.

The described device contains an output shaft 1, on which the gear is mounted

(gear) 2 meshing with the driving gears of the differential mechanisms 3 n 4. The crown gears of the mechanisms are in interaction with the shaft of the servo motors 5 and 6. On the main shaft of the mechanism 3 there is a selsyn sensor 7. Continuing the main shafts mechanisms 3 and 4 are placed screws 8 and 9, which move the nuts 10 and // along the fixed guides 12 and 13.

The limit switches 14 and 15 fix the starting position of the nuts, the limit switch 16 fixes the same position of the nuts with respect to the screws.

On the gear shaft mounted relay

17, the revolutions count, it serves to turn on both servomotors.

The pa of the machine is carried out with the help of a power resolver 21, which drives the regulator shaft of the variator through a gearbox 22.

The operation of the device. When the shaft rotates / rotates the selsyn-sensor 7, which provides the same rotation of the rotor of the power selsyn-receiver 21 and the corresponding rotation of the regulator shaft of the variator. At the same time, screws 8 and 9, which provide LR rotary movement of nuts 10 and 11, proportional to the angle of rotation of shaft 1, are simultaneously moved. If it is necessary to stop the machine during a cycle, the servomotor 5 is activated, which drives the gear 3 of the gearbox and provides fast rotation the main shaft of the mechanism 3 and the rotor of the selsyna gauge 7 in the reverse direction. In this case, the screw 8 retracts the secret 10 to its original position.

The rotor of the power selsyn-receiver 21 duplicates the rotation of the rotor of the selsip-sensor and provides the rotation of the regulator shaft of the variator to the position corresponding to the lowest angular velocity of the driven shaft of the variator and the rotor of the machine. As soon as the nut 10 returns to its original position, the limit switch 14 is activated, which opens the power supply circuit of the servomotor 5 and the drive motor. The nut // remains in place, thereby ensuring that the angular velocity of the rotor at which the machine was stopped is memorized.

During the subsequent start-up of the machine, the drive motor and the servomotor 5 are turned on. The latter ensures the rapid rotation of the shaft: mechanism 3, in the same direction as the shaft 1 rotates. The power selsyn-21 drives the variable speed control shaft and provides a quick increase in the angular velocity the machine rotor to the value fixed by the nut 11 when the machine is stopped. As soon as the limit switch 16, mounted on the nut 10, meets with the nut stop 11, the power supply of the servomotor 5 opens. At this point, the angular velocity of the rotor reaches the same magnitude as when the machine stopped.

. At the time of the end of the cycle, when the shaft / makes a given number of revolutions, the revoice counting relay is activated. It includes servomotors 5 and 6, which provide a reduction in the angular velocity of the rotor to the lowest value and the return of nuts 10 and vi 11 to their original position. Upon the return of the nuts to the initial position, the limit switches 14 and 15 open, opening the power supply circuit of the servomotors and the drive motor. The loop zaachichivaets on this.

Subject invention

Claims (2)

1. A device for adjusting the drive, for example, the iriver of a rope mask, contains a gear mounted on the output shaft of the machine, two differential mechanisms interacting with this wheel, and worm gears connecting one of the links of each differential mechanism with a servo motor differing from that, in order to reduce the overloads acting on the actuator during the start-up period, it is equipped with two spindle screws with nuts and guide rails for the nuts, each of which is associated with one differential link The mechanism and two limit switches, one of which is installed on the device housing and serves to turn off the drive motor, and the other is installed on one of the nuts, interact with the other nut and turn off one of the servomotors, which makes it possible to memorize the rotation speed of the output shaft when the machine stops during the cycle. 2. The device according to claim 1, characterized in that it is provided with an additional limit switch installed on the device case, which serves to turn off the second servomotor and the rev counter, which is installed on the gear shaft shaft and turns on both servomotors, as a result retraction of both nuts to the initial position after the end of the cycle. 22